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Keywords: turbocharger
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Proceedings Papers

Proc. ASME. IJTC2012, ASME/STLE 2012 International Joint Tribology Conference, 217-219, October 7–10, 2012
Paper No: IJTC2012-61041
... Many high speed turbochargers operate with limit cycle vibration as a result of fluid-film instability. This problem has been under investigation for the past seven years. Only now has a turbocharger with fluid film bearings been run to full speed and loaded, with essentially no bearing induced...
Proceedings Papers

Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 219-221, October 24–26, 2011
Paper No: IJTC2011-61123
... 10 02 2012 It is well known that the standard bearing for high speed turbochargers is a floating ring design. This design typically results in a limit cycle instability with larger than desired overall vibration response. The desire would be to have a small synchronous vibration...
Proceedings Papers

Proc. ASME. IJTC2010, STLE/ASME 2010 International Joint Tribology Conference, 175-177, October 17–20, 2010
Paper No: IJTC2010-41021
... 22 04 2011 Automotive turbochargers are known to have operation into the self-excited unstable vibration region. In the past these instabilities have been accepted as unavoidable, but recent developments in analysis and instrumentation may make it possible to reduce or eliminate them...
Proceedings Papers

Proc. ASME. IJTC2009, ASME/STLE 2009 International Joint Tribology Conference, 213-215, October 19–21, 2009
Paper No: IJTC2009-15027
... imbalance to determine the influence on the level of instability frequency components for a small high speed turbocharger rotor. The initial experimental results for the application of a known imbalance on the compressor end of a high speed turbocharger, indicates a reduced level for the lower instability...
Proceedings Papers

Proc. ASME. IJTC2008, STLE/ASME 2008 International Joint Tribology Conference, 513-515, October 20–22, 2008
Paper No: IJTC2008-71260
... 08 06 2009 The design of a turbocharger test stand using high pressure compressed air is discussed in this paper. The turbocharger test stand will be used mainly for bearing testing and turbocharger shaft vibration measurement. The purpose of these measurements is to discover a bearing...
Proceedings Papers

Proc. ASME. IJTC2006, Part A: Tribomaterials; Lubricants and Additives; Elastohydrodynamic Lubrication; Hydrodynamic Lubrication and Fluid Film Bearings; Rolling Element Bearings; Engine Tribology; Machine Components Tribology; Contact Mechanics, 559-566, October 23–25, 2006
Paper No: IJTC2006-12036
... 07 10 2008 Automotive turbochargers are known to have operation into the linear unstable region. The operation in the nonlinear limit cycle has been tolerated on most applications to date. The need for quieter, smoother operation and reduced emissions has prompted new evaluations...